What to do if shore power is 50hz and onboard frequency is 60hz.? How will you take shore power what to do if shore power is 50hz and onboard frequency is 60hz.? How will you take shore power?

 

* The ratio voltage/frequency in the case of motors and transformers. 

* The ratio for 440V and 60 Hz would be 7.33 V/Hz. 

If shore supply is 50 HZ, 

So, 7.33 X 50 = 366 

Which is closer to the standard 380 volts 50Hz., So the shore supply should be reduced near 380V by adjusting tap of transformer (Shore) .  

*By doing this the efficiency of pumps will be reduced, and we definitely have to keep an eye on the temperatures of the motor windings. 

* In his case, may not be able to load the machines up to their rated power, but for lower power requirements supplying them at 380V/50Hz will work. Definitely, other stated parameters (efficiency, power factor, etc) will not be met.